The United States is experiencing a significant resurgence of measles, with , marking 982 confirmed cases nationwide – a figure exceeding that of the same period in previous years. This surge is prompting concern among public health officials and underscores the importance of vaccination.
As of , cases have been reported across 26 states, including Arizona, California, Colorado, Florida, Georgia, Idaho, Illinois, Kentucky, Maine, Minnesota, Nebraska, New York City, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South Dakota, Texas, Utah, Vermont, Virginia, Washington and Wisconsin. Six cases have also been identified in international visitors to the U.S.
The current outbreak is particularly pronounced in South Carolina, which has seen nearly 800 cases and at least 20 hospitalizations since January. Rising case numbers are also being observed in Utah, Arizona, and Florida, including a cluster at Ave Maria University. These outbreaks contribute to the fact that 89% of confirmed cases – 870 out of 982 – are associated with outbreaks, with 73 originating in 2026 and 797 stemming from outbreaks that began in 2025.
This year’s increase follows a concerning trend established in 2025, when a total of 2,281 confirmed measles cases were reported across the country. That figure represented the highest number of cases seen in the U.S. Since the early 1990s.
Understanding Measles and its Risks
Measles is a highly contagious viral infection that can spread quickly through the air when an infected person coughs or sneezes. It’s so contagious, in fact, that it’s considered more infectious than diseases like COVID-19, influenza, polio, and even Ebola. The virus can remain infectious in the air for up to two hours and on surfaces for even longer.
While often perceived as a childhood illness, measles can cause serious complications, particularly in young children. These complications can include pneumonia, encephalitis (inflammation of the brain), and even death. In 2025, measles was responsible for three fatalities in the United States.
The resurgence of measles is largely attributed to declining vaccination rates. Widespread misinformation about vaccines has contributed to hesitancy, leaving more individuals susceptible to infection. Vaccination remains the most effective way to prevent measles and protect both individuals and communities.
The Importance of Vaccination
The measles, mumps, and rubella (MMR) vaccine is highly effective, providing approximately 97% protection against measles with two doses. The CDC recommends that all children receive two doses of the MMR vaccine, with the first dose administered between 12 and 15 months of age and the second dose between 4 and 6 years of age.
Individuals who are unsure of their vaccination status should consult with their healthcare provider. Adults who have never been vaccinated or who have only received one dose of the MMR vaccine should also consider getting vaccinated, especially those who are planning to travel internationally.
Outbreak-Associated Cases
The high proportion of cases linked to outbreaks – 89% – highlights the importance of controlling transmission within communities. Outbreaks often occur in areas with low vaccination coverage, where the virus can easily spread from person to person. The 7 outbreaks reported in 2026, combined with the ongoing impact of 797 cases from 2025 outbreaks, demonstrate the persistence of this threat.
Public health officials are actively working to contain outbreaks through vaccination campaigns, contact tracing, and education efforts. However, preventing future outbreaks requires sustained efforts to increase vaccination rates and address vaccine hesitancy.
Looking Ahead
The current measles situation underscores the ongoing vulnerability to vaccine-preventable diseases. Maintaining high vaccination coverage is crucial for protecting public health and preventing the re-emergence of diseases that were once considered largely eradicated. Continued monitoring of measles cases and outbreaks, along with proactive vaccination efforts, will be essential in mitigating the impact of this highly contagious virus.
The CDC provides resources for communities experiencing measles outbreaks, including sample community letters and a toolkit for preparedness. Individuals with concerns about measles or vaccination should consult with their healthcare provider or visit the CDC website for more information.
